A self-circulating jet heat pump system

Abstract

This invention provides a self-circulating jet heat pump system, comprising: a generator capable of producing high-temperature, high-pressure refrigerant vapor; an evaporator capable of producing low-temperature, low-pressure refrigerant vapor; an ejector capable of ejecting low-temperature, low-pressure refrigerant vapor; a condenser, in which a portion of the refrigerant liquid obtained after condensation enters the evaporator via an expansion valve, and the remaining refrigerant liquid enters the generator; and a pneumatic liquid booster pump disposed between the generator and the ejector, wherein the high-temperature, high-pressure refrigerant vapor first enters the pneumatic liquid booster pump to drive its operation, and then enters and is ejected through the ejector; the pneumatic liquid booster pump can pump the refrigerant liquid from the condenser into the generator. The self-circulating jet heat pump system of this invention can achieve self-circulating operation of the jet heat pump system, and the pneumatic liquid booster pump does not consume electrical energy and has high operational stability.

Description

Technical Field

[0001] This invention relates to the field of heat pump technology, and in particular to a self-circulating jet heat pump system. Background Technology

[0002] With the increasing tension surrounding energy issues, the importance of energy conservation is becoming increasingly apparent. Currently, my country's industrial sector generates a large amount of low-grade waste heat, most of which is directly released into the environment without being utilized, resulting in energy waste.

[0003] As a highly efficient and energy-saving device that fully utilizes low-grade heat energy, heat pump systems offer economic benefits by recovering and utilizing industrial waste heat, while also reducing thermal pollution to the environment. Among these, jet heat pumps utilize ejectors to replace the compressor in traditional heat pump systems, reducing compressor power consumption. They also offer advantages such as simple structure, low investment, reliable operation, high thermal efficiency, energy saving, and environmental friendliness.

[0004] The working principle of a jet heat pump is that the refrigerant absorbs heat from a high-temperature heat source in the generator to form high-temperature, high-pressure vapor, which enters the ejector inlet and is then ejected into the evaporator to form low-temperature, low-pressure vapor due to the expansion valve and low-temperature heat source. After mixing in the ejector mixing chamber, the vapor enters the condenser to release heat. Part of the condensed refrigerant enters the evaporator, and part is returned to the generator by the circulation pump.

[0005] Typically, the pressure inside the generator in a jet heat pump system is much higher than that in the condenser. Therefore, to achieve system circulation, a high-head working fluid circulation pump needs to be installed between the generator and the condenser. The working fluid circulation pump consumes a lot of electricity, and it generates a lot of heat during long-term operation. Furthermore, the vaporization of the refrigerant in the working fluid circulation pump can also cause pump cavitation problems.

[0006] In addition, the temperature of industrial waste heat is not constant, which can cause pressure fluctuations in the generating tank, preventing the condensate from circulating into the generating tank and causing the heat pump system to malfunction. Summary of the Invention

[0007] This invention designs a self-circulating jet heat pump system to overcome the problems of high power consumption, cavitation of the working fluid circulation pump due to long-term high-temperature operation, and poor system stability caused by temperature fluctuations due to industrial waste heat in existing jet heat pumps.

[0008] To address the above problems, this invention discloses a self-circulating jet heat pump system, comprising:

[0009] In the generator, the refrigerant exchanges heat with a high-temperature heat source to produce high-temperature and high-pressure refrigerant vapor.

[0010] An evaporator in which the refrigerant exchanges heat with a low-temperature heat source to produce low-temperature, low-pressure refrigerant vapor;

[0011] The ejector ejects high-temperature, high-pressure refrigerant vapor from the generator, forming a low-pressure zone at the ejector's inlet, and ejects low-temperature, low-pressure refrigerant vapor from the evaporator. The high-temperature, high-pressure refrigerant vapor from the generator and the low-temperature, low-pressure refrigerant vapor from the evaporator mix and are then discharged from the ejector's inlet.

[0012] The refrigerant vapor discharged from the nozzle of the ejector is condensed in the condenser to obtain a portion of the refrigerant liquid, which then enters the evaporator through the expansion valve to exchange heat with a low-temperature heat source. The remaining refrigerant liquid enters the generator to exchange heat with a high-temperature heat source.

[0013] The self-circulating jet heat pump system further includes: a pneumatic liquid booster pump, which is disposed between the generator and the ejector. High-temperature and high-pressure refrigerant vapor from the generator first enters the pneumatic liquid booster pump to drive its operation, and then enters and is ejected through the ejector; the pneumatic liquid booster pump can pump refrigerant liquid from the condenser into the generator.

[0014] Furthermore, the pneumatic-liquid booster pump is equipped with:

[0015] Gas end piston,

[0016] Liquid end piston,

[0017] A connecting rod connects the gas-end piston and the liquid-end piston, and the gas-end piston can drive the liquid-end piston to move via the connecting rod;

[0018] The reversing valve, through its reversing action, causes the gas entering the pneumatic-liquid booster pump to alternately act on both sides of the gas-end piston, pushing the gas-end piston to reciprocate.

[0019] During the reciprocating motion of the gas end piston, it can drive the liquid end piston to reciprocate, completing the cycle of drawing in refrigerant liquid and discharging high-pressure refrigerant liquid.

[0020] Furthermore, the pneumatic-liquid booster pump includes:

[0021] The high-temperature, high-pressure refrigerant vapor from the generator enters the gas end of the pneumatic-liquid booster pump through the gas end inlet.

[0022] The refrigerant vapor from the gas end of the pneumatic liquid booster pump enters the ejector through the gas end outlet.

[0023] A portion of the refrigerant liquid obtained after condensation by the condenser enters the liquid end of the pneumatic liquid booster pump through the liquid end inlet.

[0024] The refrigerant liquid from the liquid end of the pneumatic liquid booster pump enters the generator through the liquid end outlet.

[0025] Furthermore, the area of ​​the gas end piston is larger than the area of ​​the liquid end piston.

[0026] Furthermore, the self-circulating jet heat pump system also includes a generator tank, which is disposed between the generator and the pneumatic liquid booster pump.

[0027] Furthermore, the generating tank is a sealed tank;

[0028] The liquid inlet on the generating tank is connected to the liquid outlet of the pneumatic liquid booster pump, and the liquid outlet on the generating tank is connected to the refrigerant inlet of the generator.

[0029] The gas inlet on the generating tank is connected to the refrigerant outlet in the generator, and the gas outlet on the generating tank is connected to the gas inlet in the pneumatic liquid booster pump.

[0030] Furthermore, the self-circulating jet heat pump system also includes a condenser tank, which is disposed between the condenser and the pneumatic liquid booster pump.

[0031] Furthermore, the condenser is a sealed tank;

[0032] The refrigerant inlet on the condenser tank is connected to the refrigerant outlet on the condenser, so that some of the liquid refrigerant discharged from the condenser can enter the condenser tank;

[0033] The refrigerant outlet on the condenser is connected to the liquid inlet of the pneumatic-liquid booster pump, so that the liquid refrigerant in the condenser can enter the generator through the pneumatic-liquid booster pump.

[0034] Furthermore, the self-circulating jet heat pump system also includes a delivery pipeline, which comprises:

[0035] The first pipeline connects the gas outlet of the generator tank to the gas inlet of the pneumatic-liquid booster pump.

[0036] The second pipe connects the liquid inlet of the generating tank to the liquid outlet of the pneumatic liquid booster pump.

[0037] The third pipe connects the gas outlet of the pneumatic-liquid booster pump to the nozzle of the injector.

[0038] The sixth pipe connects the refrigerant outlet in the condenser to the liquid inlet in the pneumatic liquid booster pump.

[0039] Furthermore, the conveying pipeline also includes:

[0040] The fourth pipe connects the injection port in the ejector to the refrigerant inlet in the condenser;

[0041] The fifth pipe connects the refrigerant outlet in the condenser to the refrigerant inlet in the condenser tank;

[0042] The seventh pipe connects the refrigerant outlet in the condenser and the refrigerant inlet in the expansion valve;

[0043] The eighth pipe connects the refrigerant outlet in the expansion valve and the refrigerant inlet in the evaporator;

[0044] The ninth pipe connects the refrigerant outlet in the evaporator to the ejector port in the ejector;

[0045] The tenth pipe connects the refrigerant outlet in the generator to the gas inlet in the generator tank;

[0046] The eleventh pipe connects the refrigerant inlet in the generator to the liquid outlet in the generator tank.

[0047] The self-circulating jet heat pump system described in this application has the following advantages:

[0048] First, it has a simple structure and is easy to implement;

[0049] Secondly, the structural modifications to the existing jet heat pump system are minor, requiring only the addition of components such as a pneumatic liquid booster pump, which are then connected via pipelines in a specific manner.

[0050] Third, the self-circulating jet heat pump system described in this application uses a pneumatic liquid booster pump instead of a driven working fluid circulation pump, which can realize the self-circulation operation of the jet heat pump system. Moreover, the pneumatic liquid booster pump does not consume electrical energy, avoiding the problems of large power loss and cavitation caused by the introduction of a working fluid circulation pump in the prior art. At the same time, the pneumatic liquid booster pump is less dependent on the temperature fluctuation of industrial waste heat and can stably pump the refrigerant liquid into the generator, ensuring the stable operation of the jet heat pump system.

[0051] Fourth, the self-circulating jet heat pump system described in this application has low operating costs, high operational stability, and can operate for a long time. Attached Figure Description

[0052] Figure 1 This is a schematic diagram illustrating the working principle of the self-circulating jet heat pump system described in this invention.

[0053] Explanation of reference numerals in the attached figures:

[0054] 1. Generator; 2. Generating tank; 3. Pneumatic-liquid booster pump; 301. Gas inlet; 302. Gas outlet; 303. Liquid outlet; 304. Liquid inlet; 305. Gas piston; 306. Liquid piston; 307. Connecting rod; 4. Condenser tank; 5. Condenser; 6. Ejector; 601. Nozzle; 602. Injector port; 603. Injector port; 7. Evaporator; 8. Expansion valve; 9. Delivery pipeline; 901. First pipeline; 902. Second pipeline; 903. Third pipeline; 904. Fourth pipeline; 905. Fifth pipeline; 906. Sixth pipeline; 907. Seventh pipeline; 908. Eighth pipeline; 909. Ninth pipeline; 910. Tenth pipeline; 911. Eleventh pipeline. Detailed Implementation

[0055] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0056] like Figure 1 As shown, a self-circulating jet heat pump system includes:

[0057] In generator 1, the refrigerant exchanges heat with a high-temperature heat source to generate high-temperature and high-pressure refrigerant vapor.

[0058] Evaporator 7, in which the refrigerant exchanges heat with a low-temperature heat source to produce low-temperature, low-pressure refrigerant vapor;

[0059] The ejector 6 ejects high-temperature, high-pressure refrigerant vapor from the generator 1, forming a low-pressure zone at the ejector port 602 of the ejector 6, and ejects low-temperature, low-pressure refrigerant vapor from the evaporator 7. The high-temperature, high-pressure refrigerant vapor from the generator 1 and the low-temperature, low-pressure refrigerant vapor from the evaporator 7 are mixed and discharged from the ejector port 603 of the ejector 6.

[0060] The refrigerant vapor discharged from the injection port 603 of the ejector 6 is condensed in the condenser 5. The resulting refrigerant liquid portion enters the evaporator 7 again after passing through the expansion valve 8 to exchange heat with the low-temperature heat source. The remaining refrigerant liquid enters the generator 1 again to exchange heat with the high-temperature heat source.

[0061] The self-circulating jet heat pump system further includes: a pneumatic liquid booster pump 3, which is disposed between the generator 1 and the ejector 6. The high-temperature and high-pressure refrigerant vapor from the generator 1 first enters the pneumatic liquid booster pump 3 to drive its operation, and then enters and is ejected through the ejector 6; the pneumatic liquid booster pump 3 can pump the refrigerant liquid from the condenser 5 into the generator 1.

[0062] During the operation of a jet heat pump system, since the generator 1 is a heat exchanger that exchanges heat with a high-temperature heat source, high-temperature and high-pressure refrigerant vapor is generated after heat exchange in the generator 1, and the pressure inside the generator 1 will be relatively high. In contrast, the refrigerant vapor discharged by the ejector 6 will condense and liquefy in the condenser 5, so the pressure in the condenser 5 is relatively low. On this basis, the pressure inside the generator 1 is much higher than the pressure in the condenser 5. If the refrigerant in the condenser 5 is to be transported to the generator 1, a high-lift working fluid circulation pump is required. However, the use of the working fluid circulation pump will result in high power consumption of the heat pump system, cavitation problems caused by prolonged high-temperature operation of the working fluid circulation pump, and poor operational stability of the heat pump system due to temperature fluctuations caused by industrial waste heat.

[0063] In this application, by setting a pneumatic-liquid booster pump 3 between the generator 1 and the ejector 6, during operation, high-temperature and high-pressure refrigerant vapor from the generator 1 is first introduced into the pneumatic-liquid booster pump 3. The energy of the high-temperature and high-pressure refrigerant vapor from the generator 1 drives the pneumatic-liquid booster pump 3 to operate, and the pneumatic-liquid booster pump 3 is used to pressurize the refrigerant liquid from the condenser 5 and pump it into the generator 1. In this way, the self-circulation operation of the jet heat pump system can be realized, and the problems of large power loss and cavitation caused by the introduction of the working fluid circulation pump in the prior art are avoided. At the same time, the pneumatic-liquid booster pump 3 has low dependence on the temperature fluctuation of industrial waste heat and can stably pump the refrigerant liquid into the generator 1, ensuring the stable operation of the jet heat pump system.

[0064] The working principle of the specific structure of the pneumatic liquid booster pump 3 is existing technology and will not be described in detail here.

[0065] The following is a brief description of its operation when applied to the self-circulating jet heat pump system described in this application.

[0066] Specifically, the pneumatic-liquid booster pump 3 is equipped with:

[0067] Gas end piston 305,

[0068] Liquid end piston 306,

[0069] Linkage 307 connects the gas end piston 305 and the liquid end piston 306. The gas end piston 305 can drive the liquid end piston 306 to move through the link 307.

[0070] The reversing valve, through its reversing action, causes the gas entering the pneumatic-liquid booster pump 3 to alternately act on both sides of the gas end piston 305, pushing the gas end piston 305 to reciprocate.

[0071] During the reciprocating motion of the gas end piston 305, it can drive the liquid end piston 306 to reciprocate, completing the cycle of drawing in refrigerant liquid and discharging high-pressure refrigerant liquid, thereby realizing the continuous operation of the pneumatic liquid booster pump 3.

[0072] Preferably, the reversing valve is a two-position five-way reversing valve.

[0073] The specific structures of components such as the gas end piston 305, the liquid end piston 306, the connecting rod 307, and the reversing valve can be found in the prior art and will not be described in detail here.

[0074] Furthermore, the pneumatic-liquid booster pump 3 includes:

[0075] Gas inlet 301: High-temperature and high-pressure refrigerant vapor from the generator 1 enters the gas end of the pneumatic liquid booster pump 3 through the gas inlet 301.

[0076] Gas outlet 302, the refrigerant vapor at the gas end of the pneumatic liquid booster pump 3 enters the ejector 6 through the gas outlet 302;

[0077] A portion of the refrigerant liquid obtained after condensation by the condenser 5 enters the liquid end of the pneumatic liquid booster pump 3 through the liquid end inlet 304.

[0078] The refrigerant liquid from the liquid end of the pneumatic liquid booster pump 3 enters the generator 1 through the liquid end outlet 303.

[0079] Furthermore, the area of ​​the gas end piston 305 is larger than the area of ​​the liquid end piston 306.

[0080] In the pneumatic-liquid booster pump 3, the ratio of the pressure at the liquid end outlet 303 to the pressure at the gas end inlet 301 is equal to the ratio of the areas of the gas end piston 305 and the liquid end piston 306. Therefore, when the area of ​​the gas end piston 305 is greater than the area of ​​the liquid end piston 306, the pressure at the liquid end outlet 303 will be greater than the pressure at the gas end inlet 301. At the same time, the pressure at the liquid end outlet 303 will also be greater than the pressure in the generator 1, enabling the pneumatic-liquid booster pump 3 to deliver refrigerant liquid into the generator 1.

[0081] Meanwhile, since the area of ​​the gas end piston 305 is larger than the area of ​​the liquid end piston 306, the pneumatic liquid booster pump 3 can use refrigerant vapor to provide a lower pressure to drive the large-diameter piston of the pump - i.e. the gas end piston 305, and act on the small-diameter piston - i.e. the liquid end piston 306 through the connecting rod 307, ultimately generating a higher pressure, thereby transporting the liquid from the low-pressure end to the high-pressure end.

[0082] Furthermore, the self-circulating jet heat pump system also includes a generator tank 2, which is disposed between the generator 1 and the pneumatic liquid booster pump 3.

[0083] Furthermore, the generating tank 2 is a sealed tank;

[0084] The liquid inlet on the generating tank 2 is connected to the liquid outlet 303 in the pneumatic liquid booster pump 3, and the liquid outlet on the generating tank 2 is connected to the refrigerant inlet in the generator 1.

[0085] The gas inlet on the generating tank 2 is connected to the refrigerant outlet in the generator 1, and the gas outlet on the generating tank 2 is connected to the gas inlet 301 in the pneumatic liquid booster pump 3.

[0086] The high-pressure refrigerant liquid discharged by the pneumatic liquid booster pump 3 first enters the generating tank 2, and then enters the generator 1; the high-temperature and high-pressure refrigerant vapor generated by the generator 1 first enters the generating tank 2, and then enters the pneumatic liquid booster pump 3. In this way, the generating tank 2 can buffer the refrigerant liquid and refrigerant vapor, and at the same time, the generating tank 2 can also perform gas-liquid separation.

[0087] When the pressure inside the generating tank 2 fluctuates, the pressure at the liquid end of the pneumatic liquid booster pump 3 also fluctuates accordingly to ensure the circulation of refrigerant within the system.

[0088] Furthermore, the self-circulating jet heat pump system also includes a condenser tank 4, which is disposed between the condenser 5 and the pneumatic liquid booster pump 3.

[0089] Furthermore, the condenser 4 is a sealed tank;

[0090] The refrigerant inlet on the condenser tank 4 is connected to the refrigerant outlet on the condenser 5, so that some of the liquid refrigerant discharged from the condenser 5 can enter the condenser tank 4.

[0091] The refrigerant outlet on the condenser tank 4 is connected to the liquid inlet 304 of the pneumatic liquid booster pump 3, so that the liquid refrigerant in the condenser tank 4 can enter the generator 1 through the pneumatic liquid booster pump 3.

[0092] In this application, the condenser 4 serves to further cool the liquid refrigerant and simultaneously buffer the liquid refrigerant.

[0093] Furthermore, the self-circulating jet heat pump system also includes a delivery pipe 9, which comprises:

[0094] The first pipe 901 connects the gas outlet of the generator 2 and the gas inlet 301 of the pneumatic liquid booster pump 3.

[0095] The second pipe 902 connects the liquid inlet of the generating tank 2 to the liquid outlet 303 of the pneumatic liquid booster pump 3.

[0096] The third pipe 903 connects the gas outlet 302 of the pneumatic-liquid booster pump 3 and the nozzle 601 of the injector 6.

[0097] The fourth pipe 904 connects the injection port 603 in the ejector 6 and the refrigerant inlet in the condenser 5;

[0098] The fifth pipe 905 connects the refrigerant outlet in the condenser 5 and the refrigerant inlet in the condenser tank 4;

[0099] The sixth pipe 906 connects the refrigerant outlet in the condenser 4 to the liquid inlet 304 in the pneumatic liquid booster pump 3.

[0100] The seventh pipe 907 connects the refrigerant outlet in the condenser 5 and the refrigerant inlet in the expansion valve 8;

[0101] The eighth pipe 908 connects the refrigerant outlet in the expansion valve 8 and the refrigerant inlet in the evaporator 7;

[0102] The ninth pipe 909 connects the refrigerant outlet in the evaporator 7 and the ejector port 602 in the ejector 6;

[0103] The tenth pipe 910 connects the refrigerant outlet in the generator 1 and the gas inlet in the generator tank 2;

[0104] The eleventh pipe 911 connects the refrigerant inlet of the generator 1 to the liquid outlet of the generator tank 2.

[0105] The generator 1, generator tank 2, pneumatic liquid booster pump 3, condenser tank 4, condenser 5, ejector 6, evaporator 7 and expansion valve 8 can be integrated into an organic whole through the various pipes in the delivery pipeline 9, so that the refrigerant in the jet heat pump system can be recycled through the cooperation of each part.

[0106] The working principle of the self-circulating jet heat pump system described in this application is explained in detail below:

[0107] The pneumatic-liquid booster pump 3 is driven by the refrigerant vapor generated by the generator 1. The pneumatic-liquid booster pump 3 then returns the liquid refrigerant from the condenser tank 4 to the generator tank 2, whereby the liquid refrigerant is supplied to the generator 1. Subsequently, the refrigerant in the generator 1 absorbs heat from a high-temperature heat source and evaporates to form high-temperature, high-pressure refrigerant vapor. This vapor enters the pneumatic-liquid booster pump 3, which drives its operation. The refrigerant vapor then enters the nozzle 601 of the ejector 6 from the gas outlet 302 of the pneumatic-liquid booster pump 3. In the ejector 6, high-pressure gas exits from the nozzle 601 of the ejector 6. 01 enters, converting pressure energy into velocity energy. The high-speed fluid forms a low-pressure zone at the ejector port 602 of the ejector 6, drawing in low-pressure fluid from the evaporator 7. After mixing, the fluid is discharged from the outlet and enters the condenser 5. In the condenser 5, the fluid condenses to form liquid refrigerant. Part of the liquid refrigerant is throttled by the expansion valve 8 to become low-temperature, low-pressure wet vapor. After absorbing heat and evaporating in the evaporator 7, the refrigerant is ejected again. The other part of the liquid refrigerant re-enters the generator 1 through the condenser tank 4, the pneumatic liquid booster pump 3, and the generator tank 2, realizing the recycling of refrigerant in the jet heat pump system.

[0108] In summary, it is easy to see that the self-circulating jet heat pump system described in this application has the following advantages:

[0109] First, it has a simple structure and is easy to implement;

[0110] Secondly, the structural modifications to the existing jet heat pump system are minor, requiring only the addition of components such as a pneumatic liquid booster pump 3, which are then connected via pipes in a specific manner.

[0111] Third, the self-circulating jet heat pump system described in this application uses a pneumatic liquid booster pump 3 instead of a transmission working fluid circulation pump. This not only enables the self-circulating operation of the jet heat pump system, but also eliminates the need for the pneumatic liquid booster pump 3 to consume electrical energy, thus avoiding the problems of high power loss and cavitation caused by the introduction of a working fluid circulation pump in the prior art. At the same time, the pneumatic liquid booster pump 3 is less dependent on the temperature fluctuation of industrial waste heat and can stably pump the refrigerant liquid into the generator 1, ensuring the stable operation of the jet heat pump system.

[0112] Fourth, the self-circulating jet heat pump system described in this application has low operating costs, high operational stability, and can operate for a long time.

[0113] While the present invention has been disclosed above, it is not limited thereto. In the description of this specification, references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Any person skilled in the art can make various modifications and alterations without departing from the spirit and scope of the present invention; therefore, the scope of protection of the present invention should be determined by the scope defined in the claims.

Claims

1. A self-circulating jet heat pump system, comprising: In the generator (1), the refrigerant exchanges heat with a high-temperature heat source to generate high-temperature and high-pressure refrigerant vapor; Evaporator (7), in which the refrigerant exchanges heat with a low-temperature heat source to generate low-temperature, low-pressure refrigerant vapor; The high-temperature and high-pressure refrigerant vapor from the generator (1) is ejected through the ejector (6), forming a low-pressure zone at the ejector port (602) of the ejector (6), and ejecting the low-temperature and low-pressure refrigerant vapor from the evaporator (7). The high-temperature and high-pressure refrigerant vapor from the generator (1) and the low-temperature and low-pressure refrigerant vapor from the evaporator (7) are mixed and discharged from the ejector port (603) of the ejector (6). The refrigerant vapor discharged from the injection port (603) of the ejector (6) is condensed in the condenser (5). The resulting refrigerant liquid portion is then re-entered into the evaporator (7) after passing through the expansion valve (8) to exchange heat with the low-temperature heat source. The remaining refrigerant liquid is then re-entered into the generator (1) to exchange heat with the high-temperature heat source. The self-circulating jet heat pump system is characterized by further comprising: a pneumatic liquid booster pump (3), which is disposed between the generator (1) and the ejector (6), wherein high-temperature and high-pressure refrigerant vapor from the generator (1) first enters the pneumatic liquid booster pump (3) to drive its operation, and then enters and is ejected through the ejector (6); the pneumatic liquid booster pump (3) is capable of pumping refrigerant liquid from the condenser (5) into the generator (1); The pneumatic liquid booster pump (3) includes: Gas inlet (301): High-temperature and high-pressure refrigerant vapor from the generator (1) enters the gas end of the pneumatic liquid booster pump (3) through the gas inlet (301); Gas outlet (302): Refrigerant vapor from the gas end of the pneumatic liquid booster pump (3) enters the ejector (6) through the gas outlet (302); The liquid refrigerant obtained after condensation by the condenser (5) enters the liquid end of the pneumatic liquid booster pump (3) through the liquid end inlet (304); The refrigerant liquid at the liquid end of the pneumatic liquid booster pump (3) enters the generator (1) through the liquid end outlet (303); A gas-end piston (305) and a liquid-end piston (306), wherein the area of ​​the gas-end piston (305) is larger than the area of ​​the liquid-end piston (306); The pressure at the liquid outlet (303) is greater than the pressure at the gas inlet (301). At the same time, the pressure at the liquid outlet (303) is also greater than the pressure in the generator (1), so that the pneumatic liquid booster pump (3) can deliver the refrigerant liquid into the generator (1). The self-circulating jet heat pump system also includes a generator tank (2), which is located between the generator (1) and the pneumatic liquid booster pump (3); The generating tank (2) is a sealed tank; the liquid inlet on the generating tank (2) is connected to the liquid outlet (303) in the pneumatic liquid booster pump (3), and the liquid outlet on the generating tank (2) is connected to the refrigerant inlet in the generator (1); The gas inlet on the generating tank (2) is connected to the refrigerant outlet in the generator (1), and the gas outlet on the generating tank (2) is connected to the gas end inlet (301) in the pneumatic liquid booster pump (3).

2. The self-circulating jet heat pump system according to claim 1, characterized in that, The pneumatic liquid booster pump (3) is also equipped with: A connecting rod (307) connects the gas end piston (305) and the liquid end piston (306). The gas end piston (305) can drive the liquid end piston (306) to move through the connecting rod (307). The reversing valve, through the reversing of the reversing valve, causes the gas entering the pneumatic liquid booster pump (3) to act alternately on both sides of the gas end piston (305), pushing the gas end piston (305) to reciprocate. During the reciprocating motion of the gas end piston (305), the liquid end piston (306) can be driven to reciprocate, completing the cycle of drawing in refrigerant liquid and discharging high-pressure refrigerant liquid.

3. The self-circulating jet heat pump system according to claim 1, characterized in that, The self-circulating jet heat pump system also includes a condenser tank (4), which is located between the condenser (5) and the pneumatic liquid booster pump (3).

4. The self-circulating jet heat pump system according to claim 3, characterized in that, The condenser (4) is a sealed tank; The refrigerant inlet on the condenser tank (4) is connected to the refrigerant outlet on the condenser (5), so that a portion of the liquid refrigerant discharged from the condenser (5) can enter the condenser tank (4); The refrigerant outlet on the condenser (4) is connected to the liquid inlet (304) of the pneumatic liquid booster pump (3), so that the liquid refrigerant in the condenser (4) can enter the generator (1) through the pneumatic liquid booster pump (3).

5. The self-circulating jet heat pump system according to claim 4, characterized in that, The self-circulating jet heat pump system also includes a delivery pipe (9), which comprises: The first pipeline (901) connects the gas outlet of the generator (2) to the gas inlet (301) of the pneumatic liquid booster pump (3). The second pipe (902) connects the liquid inlet of the generating tank (2) to the liquid outlet (303) of the pneumatic liquid booster pump (3). The third pipe (903) connects the gas outlet (302) of the pneumatic liquid booster pump (3) and the nozzle (601) of the injector (6). The sixth pipe (906) connects the refrigerant outlet in the condenser (4) to the liquid inlet (304) in the pneumatic liquid booster pump (3).

6. The self-circulating jet heat pump system according to claim 5, characterized in that, The conveying pipeline (9) also includes: A fourth pipe (904) connects the injection port (603) in the ejector (6) to the refrigerant inlet in the condenser (5); The fifth pipe (905) connects the refrigerant outlet in the condenser (5) and the refrigerant inlet in the condenser tank (4); The seventh pipe (907) connects the refrigerant outlet in the condenser (5) and the refrigerant inlet in the expansion valve (8); The eighth pipe (908) connects the refrigerant outlet in the expansion valve (8) and the refrigerant inlet in the evaporator (7); The ninth pipe (909) connects the refrigerant outlet in the evaporator (7) to the ejector port (602) in the ejector (6). The tenth pipe (910) connects the refrigerant outlet in the generator (1) and the gas inlet in the generator tank (2); The eleventh pipe (911) connects the refrigerant inlet in the generator (1) and the liquid outlet in the generator tank (2).

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